Incandescent electric lamp.



S. KLEIN.

INCANDESGENT ELEGTRIG LAMP.

APPLIGATINN FILED DEC. 16, 1913.

1,1 1 3,653. Patented Oct. 13, 1914.

Vz'immm: lnwniar S l'ma/v KLE 1N will be hereinafter described.

FFICE.

INCANDESGEN'I' ELECTRIC LAMP.

Specification of Letters Patent.

Application filed December 16, 1913. Serial No. 807,086.

To all whom it may concern Be it known that I, SIMoN KLEIN, engineer, a subject of Hungary, residing at Vienna, Austria-Hungary, have invented new and useful Improvements in Incandescent Electric Lamps, of which the following is a specification.

The present invention relates to incandescent electric lamps or filament apparatus for advertising or signaling purposes.

r The object of the invention is to arrange letters, words, numerals or signs consisting of filaments within the globes or bulbs of electric lamps so that when the current flows through the lamps only the outlines or figures of the letters or the like come in an incandescent state, while those portions of the filaments connecting them to the leading in wires and serving as girders or binding stays between the several portions of the filament-letters or the like remain invisible.

With this object in view the invention consists in the construction, arrangement and combination of the several parts, all as One form of electric lamp constructed in accordance with this invention and showing the letter Z is illustrated in the accompanying drawing, but it is to be understood that all other letters or numerals or signs or even words could as well'be arranged within the globe or bulb of the lamp without departing from this invention.

a indicates the globe or bulb which is provided with the ordinary cap 00 and also with a central supporting rod 9 upon which the support of the filament is mounted; the leading in wires y, y being brought in through the glass in the ordinary way and connected with the filament.

The support 6, 0, d, e of the filament la consists of a glass rod or the like having the figure of letter Z or any other letter, sign or word to be displayed. Said support is connected to the central supporting rod 9 by one or a plurality of stays f. The support 7), 0, d, 6 may also be formed of a series of short rods of glass or other suitable insulating material melted together.

0, n, m, Z, 2' indicate hooks or supports of suitable material firmly secured to the cor- Y ners and free ends of the glass rod 6, o, d, e,

on the oppositely directed hooks h, z in several contacting coils 8 passes over the hooks 1,411, n, 0 along the s anks e, d, c, b of the glass rod following the outlines of the Z- shaped support and is finally wound on the hooks 0, p in several" close coils 1'.

The electric current will pass through the filament 70, thus heating the same, but since the current is short circuited at the contact points of the coils s, r wound on the hooks 2', h and 0, p there will be only a low temperature in said coils, which at a given voltage, is not sufiicient to heat the coils to a state of incandescence. Thus, the coils .s, r connecting the conducting wires 3 y Patented Oct. 13, 1914.

with that portion of the filament which follows the outlines of the Z-shaped glass rod and is heatedto an incandescent state, will remain dark and unvisible.

.Each lamp may be provided with a plurality of filaments and 'with a suitably arranged resistance device in order to enable.

the regulation for a given voltage.

It is selfevident that instead of said coils, conducting Wires of larger cross section than the filament 70 being in contact with the latter could be used and that instead of two coils s, 7- or conducting wires, a plurality of same may be employed if the figure of the letter, numeral, sign or word to be brought in an incandescent state requires a plurality of not-incandescent connections between the incandescent portions of said filament.

A series of electric lamps which are furnished with different incandescent letters or the like couldbe arranged side by side in order to. be enabled to obtain compound effects. In this event the lamps are arranged advantageously in series and under the control of only one resistance device.

Having now described my invention and in what manner "the same is to be performed,

,what I claim and desire to secure by Letters said support acts to hold the filament so that the latter during incandescence gives the complete effect of the symbol and whereby the sup ort acts also to itselfprovide a symbol which is visible in daylight.

2. In an advertising or signaling device,

in combination, with a bulb, a glass support support acts also to itself provide a symbol 10 within the bulb having the outline of a diswhich is visible in daylight. tinctive symbol, a series of holding elements In testimony whereof I afiix my signature on the support, and a filament following in the presence of two witnesses.

' the contour of the support and connected to SIMON EIN said holding elements whereby said sup- J port acts to hold the filament so that the Witnesses: latter during incandescence gives the com- AUoUsT' FUGGER, plete eflect of the symbol and whereby the ADA MARIA'BERGER. 

